With a remarkable range and depth of coverage, Professor Mays; internationally recognised for his highly acclaimed textbooks and work in the field; presents a straight forward, easy to understand presentation of hydraulic and hydrologic processes using the control volume approach. These processes are then extended into practical applications for water use and water excess, including water distribution systems, stormwater control, and flood storage systems. Water Resources Engineering is a textbook that can be used for the first undergraduate courses in hydraulics, hydrology, or water resources engineering and for upper level undergraduate and graduate courses in water resources engineering design. This text is also intended as a reference for practicing hydraulic engineers, civil engineers, mechanical engineers, environmental engineers, and hydrologists.